Just thought I'd add this to the mix.
There is a wonderful book that might be VERY helpful to you regarding the "period" strap hinges.
It's "Early American Wrought Iron" by Albert H. Sonn.
with 320 plates from drawings by the author.
It would be a great resource for anyone interested in "period hardware". IMO
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Bill Roberts - Ornamental Metalsmith
http://www.CustomDesignMetalArts.com
Specializing in hand forged and cast works of decorative metal art. CDMA also offers classes, workshops and One on One tutoring in the Metal Arts.